Advice needed

Focus looks soft. Like shot through a silk stocking diffusion filter.

Worth is how much one likes the watch. If it makes you happy then it is worth the expense. Value is mostly sentimental.

I like these as they can be had inexpensive. The care and feeding though often outweighs anything that could ever be recovered from resale. It does not take much to get more watches and examples than one needs.

This one has a nice lyre lug case. Plating looks worn. Most of these have sat in drawers so the dials are in decent shape. Quartz watches are sensitive to dust, so the cases are fairly well sealed. Otherwise the movement stopped even with a new battery and the the watch was set aside.

A missing battery clamp would indicate some cowboy had been in there. No battery is probably a good thing since no leak of the alkali.

The control chip can also be a problem. The factories that made them are long since dust. The designs shredded. Workers retired, senile or dead. Chips are made with a lithographic printing process. Inks are printed onto the silicon. Some of which is washed away. How long this last is anyone's guess. When power is applied the chip gets hot. The reason they are inside plastic lego bricks, is that the electricity gets converted to light (photons) inside the chip. Moisture from the air might also affect the printed patterns on the chip changing how much power can get through or is blocked. Too much power and the smoke gaskets fail, letting the smoke out.

To move the electrons tiny gold wires are attached to the silicon. Gold oxide (which is rare apart from the molecular level) is purple in color, so this is called the purple peril. Many spacecraft surcumed to this. Does give the purple red color to stained glass windows.

Static electricity also damages the timekeeping chip. Does not let the smoke out, but will cause the printed layers to melt. So no power gets through. Often refereed to as shorted out. Probably from the days of fuse boxes where the shorted fuse melted first before the fire started.

So no one really knows how long these will last. Some work fine after nearly 50 years. Others do not. So the worth is measured accordingly.

Totally agree. OP, does the watch have sentimental value to you?